Hapur vs Salem
Side-by-side air quality comparison between Hapur and Salem.
Live AQI from Open-Meteo CAMS (~45 km global model, updated hourly). Multi-year history from CPCB station data via aqinow.co pipeline (2016–2024, station-level daily records).
AQI Comparison
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Hapur averaged an AQI of 142 while Salem averaged 68 — a 74-point (109%) gap, with Hapur the more polluted and Salem the cleaner of the two. On 371 days when both cities reported, Salem was cleaner on 288 of them; the average daily gap was 86 AQI points.
Seasonality & days
Hapur peaks in November, while Salem peaks in April. Hapur logged 1.9% Severe days and 36.2% Good-or-Satisfactory days; Salem was 0% Severe and 87.1% Good-or-Satisfactory. Longest clean-air streaks: Hapur 55 days, Salem 17 days.
Year-over-year progress
Hapur has improved by 197 AQI points (58.1%) from 2018 to 2024; Salem has improved by 5 AQI points (6.8%) over the same window. The worst recorded day for Hapur reached AQI 477 at Anand Vihar (UPPCB) on 2019-10-31; Salem hit AQI 214 at Sona College of Technology (TNPCB) on 2024-01-15.
Station-level disparity
Hapur spans 1 CPCB stations with a 0-point spread (min 159, max 159); Salem spans 1 stations with a 0-point spread (min 73, max 73).